ʻEseta Fusituʻan obtained an undergraduate degree from Auckland University in New Zealand in 1964.
In 1967 she married Siaosi ʻAlokuoʻulu Wycliffe Fusituʻa, a large landowner on Niuafoʻou island who would be made Lord Fusituʻa in 1981 and represented the Niuas Nobles' constituency in the Legislative Assembly of Tonga.
She stayed there until 1981, in 1976 obtaining a master's degree in history from the Australian National University in Canberra, with a dissertation entitled King George Tupou II and the government of Tonga.
In 2001 she was appointed Chief Secretary to the Cabinet, a position she held until her retirement from the civil service in 2008.
[1][3] In 2009, Fusituʻa served as Deputy Chair of the Constitutional and Electoral Commission.